A projector includes a plurality of light source boxes (1R, 1G, 1B) each accommodating at least one solid-state light source, emission colors of accommodated solid-state light sources being different from each other, a plurality of photodetectors (205c, 206c, 207c) that are provided within respective light source boxes and that detect light from the solid-state light sources, a plurality of drive units (202 to 204) that supply current to solid-state light sources (205b, 206b, 207b) provided within respective light source boxes, and a controller (201) that holds a reference value for the solid-state light source provided within each light source box for each emission color, that causes each drive to supply current to the solid-state light source provided within each light source box, and that adjusts the amount of current output from each drive unit such that the output value of each photodetector is at a reference value which corresponds to the emission color of the solid-state light source which is a corresponding target of light detection.